Divers Alert Network is your go to place for all diving medical problems. The offer guidance and help for all problems. If you are worried about something you can just give them a call and they will happily answer your questions. They also offer courses and sell equipment. They have been around for over 30 years and are a worthy organisation to be part of. If you are a diver I would recommend joining them. I am a member of DAN and I buy my professional diving insurance from them.
Here is a selection of seminars that they gave. Some of them are truly fascinating. I would recommend taking the time to watch them, though quite a few are over 30 minutes long but they are very informative.